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Alicorn comments on Constructing fictional eugenics (LW edition) - Less Wrong
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That's plausible, but what about wisdom teeth? They appear when the jaw is already full-sized; I have heard that they wouldn't historically be a problem because you'd have lost teeth and there would be room for them.
Oh, I hadn't thought of that. I've been taught that they're vestigial, and that our ancestors had bigger jaws. But they can in fact grow into the space left by an extracted tooth. It happened to me, a few decades ago. I had a bad back molar, and instead of making a crown or something, the dentist pulled it, saying the wisdom tooth behind it would replace it. And it did!